Preparation of Nano-sized Mesoporous Silica Dioxide and Al-doped Silica Dioxide at Extremely Low Reactant Concentration

Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (6): 1055.

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Preparation of Nano-sized Mesoporous Silica Dioxide and Al-doped Silica Dioxide at Extremely Low Reactant Concentration

CHENG Hong-Yun^1,2, SHI Yan-Tao², NAN Hai-Ming², GENG Yi², CHEN Bao-Hua¹*, CAI Qiang²

1. State Key Laboratory of Applied Organic Chemistry, Department of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou 730000, China;
2. Laboratory of Advanced Materials, Department of Materials Science & Engineering, Tsinghua University, Beijing 100084, China

Received:2009-02-25 Online:2009-06-10 Published:2009-06-10
Contact: CHEN Bao-Hua, E-mail: chbh@lzu.edu.cn
Supported by:
国家自然科学基金(批准号: 50572046, 50573043)和教育部重点项目基金(批准号: 107108)资助.

Abstract

Abstract:

Syntheses of nano-sized mesoporous silica dioxide and that with Al doped were preformed at extremely low reactant concentration, and the products were controllable in size(20—70 nm), morphology and pore structure by changing the amount of deionized water or Al source in the reaction. The samples were of high BET surface area(more than 1000 m²/g) and pore volume(1.1—1.8 cm³/g). The pore structure became less ordered, the particle size decreased, the pore volume increased and a certain accumulation of holes appeared when decreasing reactants concentration or introducing Al source in the reaction. The nano-sized mesoporous samples were characterized by transmission electron microscopy(TEM), small-angle X-ray diffraction, and nitrogen adsorption/desorption techniques.

Key words: Extremely low reactant concentration, Nano-sized mesoporous silica dioxide, Self-assembly, Morphology control, Al-doped

CLC Number:

O614

TrendMD:

CHENG Hong-Yun, SHI Yan-Tao, NAN Hai-Ming, GENG Yi, CHEN Bao-Hua*, CAI Qiang. Preparation of Nano-sized Mesoporous Silica Dioxide and Al-doped Silica Dioxide at Extremely Low Reactant Concentration[J]. Chem. J. Chinese Universities, 2009, 30(6): 1055.

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Preparation of Nano-sized Mesoporous Silica Dioxide and Al-doped Silica Dioxide at Extremely Low Reactant Concentration

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